KoKo, 34, and Tristan, 27, were south of the border alongside Kendall Jennerand her NBA boyfriend Ben Simmons – and the fearsome foursome tanned, lounged, and generally had themselves a nice afternoon at a resort.

The 37-year-old KUWTK star showed off the new (old) long locks along with a TON of skin late Thursday night when she stripped down to bra and panties and opted for a "bake sesh" at home, as you can see (below):